Course Content
Object-Oriented Programming in JavaScript
Object-Oriented Programming in JavaScript
Constructor Inheritance
If there is a constructor in the parent class, the daughter class will inherit it. Here you create square, but use a Rectangle constructor, so you should pass both height and width parameters.
This is a bit inconvenient, so let's create constructor for Square class, that will use Rectangle constructor. To do that in daughter class, you should use super() function to call the parent constructor first.
This way, first you call Rectangle's constructor(height, width), and after define other attributes initialization. Then Square`s constructor is called. This way, first you create parent's object, and after that daughter's one.
Task
To the class Square, add attribute color. Then create constructor with two parameters: side length and color. In its body, call Rectangle constructor to initialize width and length, and then initialize color.
Task
To the class Square, add attribute color. Then create constructor with two parameters: side length and color. In its body, call Rectangle constructor to initialize width and length, and then initialize color.
Everything was clear?
Constructor Inheritance
If there is a constructor in the parent class, the daughter class will inherit it. Here you create square, but use a Rectangle constructor, so you should pass both height and width parameters.
This is a bit inconvenient, so let's create constructor for Square class, that will use Rectangle constructor. To do that in daughter class, you should use super() function to call the parent constructor first.
This way, first you call Rectangle's constructor(height, width), and after define other attributes initialization. Then Square`s constructor is called. This way, first you create parent's object, and after that daughter's one.
Task
To the class Square, add attribute color. Then create constructor with two parameters: side length and color. In its body, call Rectangle constructor to initialize width and length, and then initialize color.
Task
To the class Square, add attribute color. Then create constructor with two parameters: side length and color. In its body, call Rectangle constructor to initialize width and length, and then initialize color.
Everything was clear?
Constructor Inheritance
If there is a constructor in the parent class, the daughter class will inherit it. Here you create square, but use a Rectangle constructor, so you should pass both height and width parameters.
This is a bit inconvenient, so let's create constructor for Square class, that will use Rectangle constructor. To do that in daughter class, you should use super() function to call the parent constructor first.
This way, first you call Rectangle's constructor(height, width), and after define other attributes initialization. Then Square`s constructor is called. This way, first you create parent's object, and after that daughter's one.
Task
To the class Square, add attribute color. Then create constructor with two parameters: side length and color. In its body, call Rectangle constructor to initialize width and length, and then initialize color.
Task
To the class Square, add attribute color. Then create constructor with two parameters: side length and color. In its body, call Rectangle constructor to initialize width and length, and then initialize color.
Everything was clear?
If there is a constructor in the parent class, the daughter class will inherit it. Here you create square, but use a Rectangle constructor, so you should pass both height and width parameters.
This is a bit inconvenient, so let's create constructor for Square class, that will use Rectangle constructor. To do that in daughter class, you should use super() function to call the parent constructor first.
This way, first you call Rectangle's constructor(height, width), and after define other attributes initialization. Then Square`s constructor is called. This way, first you create parent's object, and after that daughter's one.
Task
To the class Square, add attribute color. Then create constructor with two parameters: side length and color. In its body, call Rectangle constructor to initialize width and length, and then initialize color.
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